Boiler devices are more economical than flowing.
One — and double -circuit boilers
A single -circuit boiler does not provide for the supply of hot water, is used exclusively for heating the premises. Double -circuit equipment that performs two functions — heating and hot water supply, is available in two types. The flowing boilers per moments carry out water heating, but consume a larger amount of fuel during operation. Boiler devices are more economical than flowing.
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